<template>
	<view class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
		  <swiper-item v-for="(item, i) in goodsInfo.pics" :key="i">
		    <image :src="item.pics_big" @click="preview(i)"></image>
		  </swiper-item>
		</swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box" v-if="goodsInfo.goods_name">
      <!-- 商品价格 -->
      <view class="price">￥{{goodsInfo.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name" >{{goodsInfo.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
    <rich-text :nodes="goodsInfo.goods_introduce"></rich-text>
    <!-- 底部 -->
    <view class="good_nav">
          <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
	</view>
</template>

<script>
// 从 vuex 中按需导出 mapState 辅助方法
import { mapState, mapMutations, mapGetters } from 'vuex'
	export default {
    computed:{
      ...mapState('mycart', ['cart']),
      ...mapGetters('mycart',['getTotal'])
    },
    watch:{
      // 通过 watch 侦听器，监听计算属性 getTotal 值的变化，从而动态为购物车按钮的徽标赋值：
      getTotal: {
        handler(newCount) {
          const findResult = this.options.find(item => item.text === '购物车')
          if(findResult) {
            findResult.info = newCount
          }
        },
        immediate:true
      }
    },
		data() {
			return {
				goodsInfo:{},
         options: [ {
        			icon: 'shop',
        			text: '店铺',
        			infoBackgroundColor:'#007aff',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	    ]
			};
		},
    onLoad(options) {
      const goodsId = options.goods_id
      this.getGoodInfo(goodsId)
    },
    methods:{
      async getGoodInfo(goods_id) {
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
           if (res.meta.status !== 200) return uni.$showMsg()
           // 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题 
           // 将 webp 的后缀名替换为 jpg 的后缀名
           res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,'<img style="display:block;"').replace(/webg /g, 'jpg')
           this.goodsInfo = res.message
      },
      preview(i) {
        // uni.previewImage方法预览图片
        uni.previewImage({
          current:i,
          urls:this.goodsInfo.pics.map(item =>item.pics_big)
        })
      },
      onClick(e) {
        // console.log(e.content.text)
        if(e.content.text === '购物车') {
          uni.switchTab({
           url: '/pages/cart/cart'
          })
        } 
      },
      ...mapMutations('mycart',['addToCart']),
      buttonClick(e) {
        if(e.content.text === '加入购物车') {
          const goods = {
             goods_id: this.goodsInfo.goods_id,       // 商品的Id
             goods_name: this.goodsInfo.goods_name,   // 商品的名称
             goods_price: this.goodsInfo.goods_price, // 商品的价格
             goods_count: 1,                           // 商品的数量
             goods_small_logo: this.goodsInfo.goods_small_logo, // 商品的图片
             goods_state: true                         // 商品的勾选状态
          }
          this.addToCart(goods)
        }
      }
    }
	}
</script>

<style lang="scss">
swiper {
  height: 750rpx;

  image {
    width: 100%;
    height: 100%;
  }
}
// 商品信息区域的样式
.goods-info-box {
  padding: 10px;
  padding-right: 0;

  .price {
    color: #f36414;
    font-size: 18px;
    margin: 10px 0;
  }

  .goods-info-body {
    display: flex;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
      padding-right: 10px;
    }
    // 收藏区域
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }

  // 运费
  .yf {
    margin: 10px 0;
    font-size: 12px;
    color: gray;
  }
}
.good_nav {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
}
.goods-detail-container {
  padding-bottom: 50px;
}
</style>
